This is a variation of Herschel Walker's 1988 Topps Sticker set that I have tried to find for a long time. It's the one that features Roger Craig of the San Francisco 49ers on the reverse. These sticker cards have many variations.
One side is a peel off sticker of a particular player, the other side has a cardboard card image of a different player, with the word Super Star at the top. So far, I have found four different versions of the Herschel Walker stickers. I honestly don't know how many are out there.